#region Copyright & License

//
// Copyright 2001-2005 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#endregion

using log4net.Core;

namespace log4net.Repository.Hierarchy {
  /// <summary>
  /// Default implementation of <see cref="ILoggerFactory"/>
  /// </summary>
  /// <remarks>
  /// <para>
  /// This default implementation of the <see cref="ILoggerFactory"/>
  /// interface is used to create the default subclass
  /// of the <see cref="Logger"/> object.
  /// </para>
  /// </remarks>
  /// <author>Nicko Cadell</author>
  /// <author>Gert Driesen</author>
  class DefaultLoggerFactory : ILoggerFactory {
    #region Internal Instance Constructors

    #endregion Internal Instance Constructors

    #region Implementation of ILoggerFactory

    /// <summary>
    /// Create a new <see cref="Logger" /> instance
    /// </summary>
    /// <param name="name">The name of the <see cref="Logger" />.</param>
    /// <returns>The <see cref="Logger" /> instance for the specified name.</returns>
    /// <remarks>
    /// <para>
    /// Create a new <see cref="Logger" /> instance with the 
    /// specified name.
    /// </para>
    /// <para>
    /// Called by the <see cref="Hierarchy"/> to create
    /// new named <see cref="Logger"/> instances.
    /// </para>
    /// <para>
    /// If the <paramref name="name"/> is <c>null</c> then the root logger
    /// must be returned.
    /// </para>
    /// </remarks>
    public Logger CreateLogger(string name) {
      if (name == null)
        return new RootLogger(Level.Debug);
      return new LoggerImpl(name);
    }

    #endregion

    #region Nested type: LoggerImpl

    /// <summary>
    /// Default internal subclass of <see cref="Logger"/>
    /// </summary>
    /// <remarks>
    /// <para>
    /// This subclass has no additional behavior over the
    /// <see cref="Logger"/> class but does allow instances
    /// to be created.
    /// </para>
    /// </remarks>
    internal sealed class LoggerImpl : Logger {
      /// <summary>
      /// Construct a new Logger
      /// </summary>
      /// <param name="name">the name of the logger</param>
      /// <remarks>
      /// <para>
      /// Initializes a new instance of the <see cref="LoggerImpl" /> class
      /// with the specified name. 
      /// </para>
      /// </remarks>
      internal LoggerImpl(string name) : base(name) {}
    }

    #endregion
  }
}